KR20090043669A - Distribution stabilizer and polymer polyol prepared by using the same - Google Patents

Abstract

The present invention relates to a dispersion stabilizer and a polymer polyol prepared using the dispersion stabilizer, wherein a polyester polyol having a functional group of 2 to 3 and an average molecular weight of 500 to 4,000 is reacted with a polyfunctional isocyanate and a mono hydroxy alkyl acrylate. It is used to prepare a polymer polyol having a polyester polyol as the base polyol, it is possible to evenly disperse the base polyol to prepare a polymer polyol having excellent dispersion stability, high hardness and high solids, such polymer polyol When using as a raw material for the production of polyurethane, it is possible to produce a polyurethane having improved physical properties such as high hardness.

Dispersion stabilizers, polymer polyols, polyester polyols, polyurethanes, hardness

Description

Dispersion Stabilizer and Polymer Polyol Prepared by Using the Same}

The present invention relates to a dispersion stabilizer and a polymer polyol prepared using the same, and more particularly, a polyester polyol having 2 to 3 functional groups and an average molecular weight of 500 to 4,000 is a polyfunctional isocyanate and a mono hydroxy alkyl acrylate. The present invention relates to a polymer polyol having improved physical properties such as excellent dispersion stability and high hardness, which is polymerized using a dispersion stabilizer and a polyester polyol prepared by reacting with a basic polyol.

Polymer polyol (POP) is also called a "copolymer polyol" and is formed by polymerizing unsaturated monomers on a basic polyol by a radical catalyst, and thus polymerizing the polymer particles dispersed in the polyol. In particular, it is widely applied to the soft mold foam field and the soft slab stock foam field is used to increase the hardness, breathability, etc. Specifically, the slab stock foam is widely used for cushioning materials of mattresses, furniture, sofas, etc. Mold foam is increasingly diversified in applications such as automobile seats, toys, and sporting goods. Polyurethane foam formed by using such a polymer polyol as a raw material for polyurethane production can exhibit improved physical properties such as high hardness compared to conventional foams.

However, the early polymer polyols prepared without using a dispersion stabilizer showed low solid content and high viscosity, and in particular, the immaturity of the dispersion technique often caused a problem of greatly inferior dispersion stability in the resin.

Since then, a method of introducing a dispersion stabilizer called Non-Aqueous Dispersant (NAD) has been implemented as a solution to overcome this problem. Dispersion stabilizers can be classified as reactive dispersion stabilizers (hereinafter referred to as 'reactive NAD') and non-reactive dispersion stabilizers (hereinafter referred to as 'non-reactive NAD'), and in most cases reactive NAD methods using reactive NADs are used. Following. The non-reactive NAD process can act as a dispersion stabilizer by interacting with a reactive monomer in a polyol without introducing an unsaturated group. The non-reactive NAD process can lower the viscosity and solidify polymer polyols prepared using an excessive amount of the dispersion stabilizer. And dispersion stability can be improved. On the other hand, the reactive NAD method is to introduce some of the unsaturated groups in the polyol to act as a dispersion stabilizer, it is possible to improve the physical properties of the polymer polyol prepared using a small amount of the dispersion stabilizer.

By the way, most conventional publications which present a method for producing the polymer polyol use a polyether polyol as the base polyol, and thus, the dispersion stabilizer is also suitable for use in a polymer polyol prepared using such a polyether polyol as the base polyol. Has been mainly studied.

Accordingly, there is a demand for a new dispersion stabilizer that can use a polyester polyol as a basic polyol, have improved physical properties such as high hardness, and have excellent dispersion stability, thereby synthesizing a polymer polyol which can be used as a basic raw material of an improved polyurethane.

Accordingly, the present inventors have made a polyester polyol based polyol, a dispersion prepared by reacting a polyester polyol having a functional group of 2 to 3 and an average molecular weight of 500 to 4,000 with a polyfunctional isocyanate and a mono hydroxy alkyl acrylate. When a polymer polyol is synthesized by introducing a stabilizer and reacting an initiator and a reactive monomer, the inventors have found that a polymer polyol having excellent dispersion stability as well as improved physical properties such as hardness can be prepared.

It is an object of the present invention to provide a reactive dispersion stabilizer.

Another object of the present invention is to provide a polymer polyol which has a polyester polyol as the base polyol and is polymerized using the dispersion stabilizer.

In order to achieve this object, the dispersion stabilizer according to the present invention is characterized in that it is prepared by reacting a polyester polyol having a functional group of 2 to 3 and an average molecular weight of 500 to 4,000 with a polyfunctional isocyanate and a mono hydroxy alkyl acrylate. .

In addition, the polymer polyol according to the present invention is characterized by having a polyester polyol as the base polyol, and polymerized using a polyester polyol, the dispersion stabilizer, the radical polymerization initiator and the reactive monomer.

The dispersion stabilizer according to the present invention can be used to prepare a polymer polyol having a polyester polyol as the base polyol, thereby uniformly dispersing the base polyol, thereby producing a polymer polyol having excellent dispersion stability and high hardness and high solid content. When the polymer polyol is used as a raw material of polyurethane, it is possible to prepare a polyurethane having improved physical properties such as high hardness.

Hereinafter, the present invention will be described in more detail.

Dispersion stabilizers of the present invention are prepared by reacting polyester polyols with polyfunctional isocyanates and mono hydroxy alkyl acrylates.

In the dispersion stabilizer of the present invention, the polyester polyol is synthesized by a condensation reaction between a polyacid and a polyalcohol, and has a functional group of 2 to 3 and an average molecular weight of 500 to 4,000. When the functional group is lower than the above range, the stability of the dispersion stabilizer is significantly lowered. When the functional group is higher than the above range, it is advantageous in terms of dispersion stability, but the viscosity is too high, so handling problems may occur.

In addition, when the average molecular weight is lower than the above range, the reaction becomes very fast and rapid exotherm may occur, and thus the synthesis itself may become unstable, and when it is used as a dispersion stabilizer, the stability is remarkably decreased. Since a problem occurs, it is preferably 500 to 4,000.

Meanwhile, as the polyacid, adipic acid, glutaric acid, glutaric acid, succinic acid, phthalic acid, phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, and sebacic acid are sebacic acid. Acid), maleic acid (maleic acid), maleic anhydride and fumaric acid may be used one or two or more polycarboxylic acids selected from the group consisting of, as the polyhydric alcohol ethylene glycol, diethylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,6-hexanediol, 1,2-propanediol, 1,3-propanediol, trimethylol propane, glycerin, dipropylene glycol and tri One or a mixture of two or more selected from the group consisting of propylene glycol may be used.

In the dispersion stabilizer of the present invention, polyfunctional isocyanates include toluene diisocyanate (TDI), methylene diphenyl diisocyanate (pure-MDI, modified-MDI) including 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, and the like. , polymer-MDI), hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI) can be used one or two or more kinds selected from the group consisting of. More preferably toluene diisocyanate (TDI), methylene diphenyl diisocyanate (pure-MDI, modified-MDI, polymer-MDI) or mixtures thereof are used.

In the dispersion stabilizer of the present invention, mono hydroxy alkyl acrylates include hydroxy ethyl methacrylate (HEMA), hydroxy ethyl acrylate (HEA), hydroxy propyl acrylate (HPA) and hydroxy butyl acrylate (HBA). One or a mixture of two or more selected from the group consisting of can be used.

To prepare the dispersion stabilizer, polyester polyols, polyfunctional isocyanates and mono hydroxy alkyl acrylates can be added and reacted to approximate a molar ratio of approximately 1: 1: 1. More specifically, mono hydroxy alkyl acrylate is most suitable in terms of reactivity and economical efficiency in the amount of 0.9 to 1.1 moles added per 1 mole of polyfunctional isocyanate.

The dispersion stabilizer of the present invention reacts the mono hydroxy alkyl acrylate and the polyfunctional isocyanate first while maintaining the temperature of 78 to 82 ° C., then adds the polyester polyol and again maintains the temperature of 72 to 82 ° C. Depending on the type, the type of diisocyanate, and the amount of diisocyanate (relative to polyol), the reaction is carried out for 1.5 to 12 hours. At this time, the reaction is terminated when the isocyanate group (-NCO group) disappears on the infrared spectrometer (I.R).

On the other hand, the polymer polyol of the present invention has a polyester polyol as the base polyol, and is polymerized using other dispersion stabilizers, radical polymerization initiators, and reactive monomers. Are synthesized.

The dispersion stabilizer in the polymer polyol of the present invention is the dispersion stabilizer prepared by reacting a polyester polyol with a polyfunctional isocyanate and a mono hydroxy alkyl acrylate, and is used in addition to the base polyol or mixed with a reactive monomer and effectively used in the polymerization process. Involved in dispersion It is not effectively dispersed when used in an amount of less than 0.5% by weight relative to the total weight of the polymer polyol, which may result in entanglement of reactive monomers or agglomeration with solid particles, and when used in an amount of more than 5.0% by weight Is made stable, but the viscosity is excessively high, so handling problems may occur, so it is most preferably used in an amount of 0.5 to 5.0% by weight.

In the present invention, the polyester polyol, which is a basic polyol, is a polyol having an average molecular weight of 500 to 4,000 formed by a condensation reaction between a polyacid and a polyalcohol, wherein the polyacid is adipic acid, glutaric acid, succinic acid ( Succinic Acid, Phthalic Acid, Phthalic Anhydride, Isophthalic Acid, Terephthalic Acid, Sebacic Acid, Maleic Acid, Maleic Anhydride, and Fumaric Acid 1 or 2 or more types of polycarboxylic acid, and the polyhydric alcohol is ethylene glycol, diethylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,6-hexanediol, 1, 2-propanediol, 1,3-propanediol, trimethylol propane, glycerin, dipropylene glycol and tripropylene glycol.

In addition, the radical polymerization initiator of the present invention is appropriately selected so that the polymerization of the reactive monomer can proceed in the maximum yield, including azobisisobutyronitrile (AIBN), azobismethylbutylonitrile (AMBN) and the like One or a mixture of two or more selected from the group consisting of an azo-based compound and a peroxide-based compound including benzyl peroxide (BPO) may be used. If the amount is less than 0.1% by weight based on the total weight of the polymer polyol, the polymerization reaction may not proceed sufficiently and the content of the unreacted monomer may increase, and when used in an amount of more than 3.0% by weight, the yield increase effect no longer appears. Most preferably, it is used in an amount of 0.1 to 3.0% by weight.

In addition, the reactive monomer of the present invention may be applied without limitation as long as the monomer having an unsaturated group, specifically, styrene monomer (SM), acrylonitrile (AN), methyl styrene, ethyl styrene, methacrylonitrile And methyl methacrylate (MMA) may be used one or two or more unsaturated monomers selected from the group consisting of. Among these, when styrene monomer (SM) is used, a milky white polymer polyol can be obtained, and when acrylonitrile (AN) is used, a yellow polymer polyol can be obtained. Such reactive monomers in the present invention may comprise 10-50% of the total weight of the polymer polyol product.

The polymer polyol of the present invention may be polymerized by further using a molecular weight modifier in addition to the main components. At this time, the molecular weight modifiers that may be used include mercaptans including alcohols including ethanol, isopropanol, butanol, ethanethiol, dodecanethiol and the like, and BTIX including toluene, xylene, ethylbenzene, etc. 1 or 2 or more compounds selected from the group consisting of BTX) can be used.

The polymerization temperature of the polymer polyol of the present invention should be determined in consideration of the viscosity of the ester resin, the type of initiator, the degree of polymerization, and the like. In the present invention, it is possible at 80 to 180 ° C, more preferably 100 to 160 ° C. . On the other hand, it is advantageous in terms of viscosity and dispersion stability that the reactive monomers are added dropwise in succession rather than all the methods at once, and the time range for the input is 1 to 10 hours. Thereafter, the reactive monomer is added dropwise and the stirring is continued while maintaining the temperature for 1 to 10 hours so that the reaction is sufficiently carried out to remove the unreacted monomer. Removal is carried out by vacuum decompression at high temperature, and depending on the type of reactive monomer, it is removed by vacuum decompression above the boiling point of the monomer.

Hereinafter, the present invention will be described in detail with reference to examples of dispersion stabilizers, and then, examples of preparation of polymerized polyols polymerized using the same, but the present invention is not limited only to these examples.

Example 1 Synthesis of Dispersion Stabilizer

First, 1.0 mol of toluene diisocyanate (TDI-80) was added to a flask substituted with nitrogen, and then 1.0 mol of hydroxy ethyl methacrylate (HEMA) was added dropwise using a dropping funnel. At this time, since the fever was severe, it was slowly added dropwise over 1 to 2 hours. After completion of the dropwise addition, the temperature was raised to 78-82 ° C. and the reaction was continued for 1 to 2 hours while maintaining the temperature. Thereafter, 1.0 mol of a polyester polyol having a molecular weight of 1,500 synthesized by condensation of adipic acid (AA) with glycol consisting of 0.3 mol of ethylene glycol (EG) and 0.7 mol of diethylene glycol (DEG) was added thereto. The dispersion stabilizer was synthesized by reacting for 3 hours while maintaining the reaction temperature at 72 ~ 82 ℃. The point at which the reaction was terminated was when the isocyanate (-NCO Group) group disappeared on a conventional infrared spectrometer. As a result of measuring the viscosity of the composite according to a conventional method it was confirmed that the 1,500cps / 75 ℃.

Examples 2 to 5 Dispersion Stabilizer Synthesis

As shown in Table 1, a dispersion stabilizer was prepared according to the same method except for Example 1 and the kinds of components.

Comparative Example 1 Synthesis of Dispersion Stabilizer

A dispersion stabilizer was prepared according to the same method except that a polyol having a molecular weight of 400 was used as compared to Example 1 as shown in Table 1 below. As a result of measuring the viscosity of the dispersion stabilizer in the same manner as in Example 1, it could be confirmed that it was 1,050 cps / 75 ° C.

Comparative Example 2 Dispersion Stabilizer Synthesis

As shown in Table 1, a dispersion stabilizer was prepared according to the same method except that a polyol having a molecular weight of 6,000 was used as compared with Example 1. As a result of measuring the viscosity of the dispersion stabilizer according to the same method as in Example 1, it was confirmed that the viscosity was too high and difficult to handle as 7,800 cps / 75 ° C.

Isocyanate Acrylate Polyester polyol Kinds Kinds Kind of Mt. Type of polyhydric alcohol Molecular Weight Example 1 TDI-80 HEMA AA EG, DEG 1,500 Example 2 TDI-80 HEMA AA EG, DEG, TMP 1,850 Example 3 TDI-80 HEMA AA, PA (anhydrous) EG, DEG 700 Example 4 pure-MDI HEMA AA EG, DEG 1,500 Example 5 pure-MDI HEMA AA EG, DEG, TMP 1,850 Comparative Example 1 TDI-80 HEMA AA EG, DEG 400 Comparative Example 2 TDI-80 HEMA AA EG, DEG 6,000

Preparation Example 1 Preparation of Polymer Polyol

700 g of a polyester polyol having a molecular weight of 1,500 synthesized by a condensation reaction of adipic acid with a glycol composed of 0.3 mole of ethylene glycol and 0.7 mole of diethylene glycol as a polyol based on a nitrogen-substituted four-necked flask, and Example 1 synthesized above After 15 g of the dispersion stabilizer was added, the temperature was raised to 120 ° C. while stirring. 300 g of styrene monomer (SM) as a reactive monomer, 9 g of azobisisobutyronitrile (AIBN) as an initiator and 9 g of dodecanethiol as a molecular weight regulator were slowly added dropwise over 2 to 3 hours using a dropping funnel. It was. After completion of the addition, the reaction was further performed for 1 to 3 hours, and then the pressure was reduced for 1 to 4 hours at a temperature of 120 to 160 ° C and a pressure of 10 to 50 torr to remove the unreacted monomer, and then the reaction was terminated. The final polymerized polymer polyol showed a milky white viscous liquid shape, and the solid content and viscosity were measured according to a conventional method. As shown in Table 3 below, the solid content was 29.3% and the viscosity was 850 cps / 75 ° C. Could.

<Production Examples 2 to 6>

As shown in Table 2, a polymer polyol was prepared according to the same method, except that the type of the composition was different from that of Preparation Example 1. In Table 2, 'polyol 1' represents a polyester polyol having a molecular weight of 1,500 synthesized by a condensation reaction of adipic acid with a glycol composed of 0.3 mole of ethylene glycol and 0.7 mole of diethylene glycol, and 'polyol 2' represents adipic acid and ethylene The polyester polyol of the molecular weight 1,750 synthesize | combined by the condensation reaction with the glycol which consists of 0.6 mol of glycols and 0.4 mol of diethylene glycol is shown. Table 3 shows the results of measuring solid content and viscosity according to a conventional method for each preparation example.

<Comparative Production Example 1>

As shown in Table 2, a polymer polyol was prepared according to the same method except that the dispersion stabilizer of Comparative Example 1 was used as the dispersion stabilizer as compared to Preparation Example 1. The final polymerized polymer polyol was milky white, and solid particles such as grains of sand and liquid polymer polyol were mixed to measure viscosity. On the other hand, the solid content of the polymer polyol was measured according to the same method as in Preparation Example 1, the solid content was 30.8% as shown in Table 3 below.

<Comparative Production Example 2>

As shown in Table 2, a polymer polyol was prepared according to the same method except that the dispersion stabilizer of Comparative Example 2 was used as the dispersion stabilizer as compared to Preparation Example 1. The final polymerized polymer polyol exhibited a milky white viscous liquid shape. The solid content and the viscosity of the polymer polyol were measured according to the same method as in Preparation Example 1, and the solid content was 30.1% as shown in Table 3 below. As 3,100cps / 75 ℃, it was confirmed that the viscosity is too high to have a difficult handling.

Production Example Comparative Production Example One 2 3 4 5 6 One 2 Polyol One 700 700 700 700 700 700 700 2 - - - - - 700 - - Dispersion stabilizer Example 1 15 30 30 30 - 15 - - Example 2 - - - - 15 - - - Comparative Example 1 - - - - - - 15 - Comparative Example 2 - - - - - - - 15 Monomer SM 300 300 600 270 300 300 300 300 AN - - - 30 - - - - Molecular weight regulator Dodecanethiol 9 9 18 9 - 9 9 9 Initiator AIBN 9 9 18 9 - 9 9 9

Production Example Comparative Production Example One 2 3 4 5 6 One 2 Solid content (%) 29.3 31.0 45.2 30.4 29.6 29.6 30.8 30.1 Viscosity (cps / 75 ℃) 850 855 1,600 855 880 935 Not measurable 3,100

Test Example 1 Preparation of Polyurethane Foam

Using the polymer polyols prepared in Preparation Examples 1, 2 and 4, the polyurethane foams of Experimental Groups 1 to 3 shown in Table 4 were prepared, and ester polyols (adipic acid and ethylene) that were previously used as a control for comparison thereto were prepared. Polyurethane foams using a polyester polyol having a molecular weight of 1,500 synthesized by a condensation reaction with a glycol composed of 0.3 mol of glycol and 0.7 mol of diethylene glycol were also prepared. The mold for comparing the physical properties of the experimental group and the control group was made of a mold made of a metal having a width (100 mm) × length (150 mm) × height (10 mm), and a prepolymer (Samsung polymermer product, UTI-4071). ) And the polyol or a mixture thereof were stirred at 4,000 rpm for 5-10 seconds at 40 ° C., and then placed in a mold maintained at 40 ° C., and after 5 minutes, the polyurethane foam was taken out for 24 hours at 25 ° C. After standing, the physical properties were measured, and the results are shown in Table 5 below.

Experimental group 1 Experiment group 2 Experiment group 3 Control Prepolymer 100 100 100 103 Polymer polyols Preparation Example 1 50 - - - Preparation Example 2 - 50 - - Preparation Example 4 - - 50 - Conventional ester polyols 50 50 50 100 Ethylene Glycol (Crosslinking Agent) 12 12 12 12 Defoamer (DC-193) 0.5 0.5 0.5 0.5 water 0.5 0.5 0.5 0.5 Catalyst (33LV) One One One One

Experimental group 1 Experiment group 2 Experiment group 3 Control Specific gravity (g / ml) 0.4 0.4 0.4 0.4 Hardness (shore C) 78 78 76 72

As can be seen in Table 5, the polyurethane foam prepared using the polymer polyol synthesized using the dispersion stabilizer of the present invention shows a high hardness.

As described above, although the present invention has been described by way of limited examples and preparations, the present invention is not limited to the above-described examples and preparations, and those skilled in the art to which the present invention pertains may use such descriptions. Various modifications and variations are possible. Therefore, the scope of the present invention should not be limited to the described embodiments and preparation examples, but should be defined by the claims below and equivalents thereof.

As is apparent, the dispersion stabilizer according to the present invention can produce a polymer polyol having a high hardness and a high solid content, and when using the polymer polyol as a raw material of the polyurethane, a polyurethane having improved physical properties such as high hardness It can manufacture.

Claims (11)

A dispersion stabilizer prepared by reacting a polyester polyol having 2 to 3 functional groups and an average molecular weight of 500 to 4,000 with a polyfunctional isocyanate and mono hydroxy alkyl acrylate. The method of claim 1, wherein the polyester polyol is synthesized by condensation reaction of polyhydric acid and polyhydric alcohol, wherein the polyacid is adipic acid, glutaric acid, succinic acid, phthalic acid ( Phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, terephthalic acid, sebacic acid, maleic acid, maleic acid, maleic anhydride, and one or more selected from the group consisting of fumaric acid Polycarboxylic acid, the polyhydric alcohol is ethylene glycol, diethylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,6-hexanediol, 1,2-propanediol, 1 Dispersion stabilizer, characterized in that one or two or more selected from the group consisting of, 3-propanediol, trimethylol propane, glycerin, dipropylene glycol and tripropylene glycol. The method of claim 1 wherein the polyfunctional isocyanate is toluene diisocyanate (TDI), methylene diphenyl diisocyanate (pure-MDI, modified-MDI, polymer-MDI), hexamethylene diisocyanate (HDI) and isophorone diisocyanate ( Dispersion stabilizer, characterized in that one or more mixtures selected from the group consisting of IPDI). The method of claim 1 wherein the mono hydroxy alkyl acrylate is hydroxy ethyl methacrylate (HEMA), hydroxy ethyl acrylate (HEA), hydroxy propyl acrylate (HPA) and hydroxy butyl acrylate (HBA). Dispersion stabilizer, characterized in that one or a mixture of two or more selected from the group consisting of. The dispersion stabilizer according to claim 1, wherein the polyester polyol, polyfunctional isocyanate and mono hydroxy alkyl acrylate are prepared by reacting at a ratio of 1 mole: 1 mole: 0.9 to 1.1 mole. A polymer polyol having a polyester polyol as the base polyol, A polymer polyol polymerized using a polyester polyol having an average molecular weight of 500 to 4,000, the dispersion stabilizer of claim 1, a radical polymerization initiator and a reactive monomer. The polymer polyol of claim 6, wherein the dispersion stabilizer is used in an amount of 0.5 to 5.0% by weight based on the total weight of the polymer polyol. The method of claim 6, wherein the polyester polyol is synthesized by a condensation reaction of polyhydric acid and polyhydric alcohol, wherein the polyacid is adipic acid, glutaric acid, succinic acid, phthalic acid ( Phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, terephthalic acid, sebacic acid, maleic acid, maleic acid, maleic anhydride, and one or more selected from the group consisting of fumaric acid Polycarboxylic acid, the polyhydric alcohol is ethylene glycol, diethylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,6-hexanediol, 1,2-propanediol, 1 Polymer polyol, characterized in that one or two or more selected from the group consisting of, 3-propanediol, trimethylol propane, glycerin, dipropylene glycol and tripropylene glycol. 7. The radical polymerization initiator according to claim 6, wherein the radical polymerization initiator comprises an azo compound including azobisisobutyronitrile (AIBN) and azobismethylbutylronitrile (AMBN), and a benzoyl peroxide (BPO). Polymer polyol, characterized in that one or a mixture of two or more selected from the group consisting of oxide compounds. The method of claim 6, wherein the reactive monomer is selected from the group consisting of styrene monomer (SM), acrylonitrile (AN), methyl styrene, ethyl styrene, methacrylonitrile and methyl methacrylate (MMA). Polymeric polyol, characterized in that it is a species or two or more unsaturated monomers. 7. The group according to claim 6, which comprises alcohols containing methanol, ethanol, isopropanol and butanol, mercaptans containing ethanethiol and dodecanethiol, and bitix (BTX) containing toluene, xylene and ethylbenzene. A polymer polyol, characterized in that the polymerization further comprises one or two or more molecular weight regulators selected from.